一、創建對應空間視圖 ，如下圖：

 

二、編寫對應的 .h 代碼，如下 ：

 

#import 

@interface ViewController : UIViewController



@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *activWaitNetWork;

@property (weak, nonatomic) IBOutlet UIProgressView *pgrsDownLoad;

@property (weak,nonatomic) NSTimer *timer;


- (IBAction)onclickStartRequest:(id)sender;

- (IBAction)onclickDownLoad:(id)sender;

@end

 

三、編寫對應的 .m 文件的實現，注釋比較詳細：

 

 

#import ViewController.h

@interface ViewController ()

@end

@implementation ViewController

@synthesize activWaitNetWork;
@synthesize pgrsDownLoad;
@synthesize timer;

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
}

- (IBAction)onclickStartRequest:(id)sender{
    
    //如果正在運行，停止； 否則 開始運行加載
    if ([activWaitNetWork isAnimating]) {
       [activWaitNetWork stopAnimating];
    }else{
       [activWaitNetWork startAnimating];
    }
}

- (IBAction)onclickDownLoad:(id)sender{
    
    //重新開始進度
    pgrsDownLoad.progress = 0;
    
    //定時任務 跟新 Progerss 的進度
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(update) userInfo:nil repeats:YES];
    
}

- (void)update{
    
    pgrsDownLoad.progress =  pgrsDownLoad.progress + 0.1 ;
    //當進度完成時，提示下載完成
    if(pgrsDownLoad.progress == 1){
        [timer invalidate];
        
        UIAlertView *alert  = [[UIAlertView alloc] initWithTitle:@溫馨提示 message:@文件下載完成 delegate:self cancelButtonTitle:@確定 otherButtonTitles:@取消, nil ];
        
        [alert show];
    }
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}




@end

四、運行效果 ，如下：